Авхив за День: Март 18, 2014

This disease is caused by intraerythrocytic parasites — Anaplasma , which carry many types of blood-sucking ticks and biting insects ( horse flies , stable fly flies , mosquitoes ) . Source pathogen invasion — sick animals and animal — parasite . To anaplasmosis susceptible cattle of different breeds and ages. The disease most often recorded in the spring and summer and autumn and in most Читать далее →